In a sweltering future Britain, heatwaves bring curfews and shutdowns—but for Polly, this summer feels different. Sent with her brother to their aunt’s eco-home beside Truthwater Lake, she’s determined to shake her fears and embrace adventure.
But as the lake begins to dry up, strange things start to surface—literally. Beneath the water lies a long-lost village, and one midnight swim changes everything. Polly finds herself pulled into the past, where bells ring, birds sing, and the secrets of the drowned world begin to stir…